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Patented Ag. 21, 1,894.

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(No Model.) 3 Sheets-Sheet 2. W. MOL. LOTTRIDGE.

SURGICAL CHAIR.

Patented Aug. 21

NITED STATES PATENT GEEICE. f

WILLIAM McLELLAND LOTTRIDGE, OE PORTSMOUTH, OHIO, AssIGNOROE ONEHALE To JOHN F. sTRAYEE, OE sAME PLACE.

SURGICAL CHAIR.4

SPECIFICATION forming part of Letters Patent N0. 524,969, dated August 21, 1894, Application tiled July 19, 1893. Serial No. 4 801947. (No model.)

To all whom/it may concern.-

Be it known that I, WILLIAM MCLELLAND LOTTRIDGE, a citizen of the United States, re-

siding at Portsmouth, in the county of Scioto and State of Ohio, have invented certain new and useful Improvements in Surgical Chairs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. A j

My invention relates to surgical and dental appliances, but more particularly to surgical chairs, and the principal object is to provide a chair and cabinet inclosing the same combined with mechanism for raising and lowering the chair, whereby all the adjustments of the chair that may be required in performing surgical operations are secured and at the same time the chair is adapted to be inclosed` reference/to the accompanying drawings, which forma/part ofwthis specification, and then'poi'nted outin the claims at the endof the description.

Referring to the drawings, Figure 1 represents a front elevation of the cabinet having the surgical chair inclosed and concealed therein. Fig. 2 is a side elevation of the same showing the cabinet doors open and the movable top resting on said doors; the chair being shown in an elevated position. Fig. 3

is a view from the rear showing the cabinet and chair-elevating mechanism in section and the chair in side elevation. Fig. #l is a plan of the same. Fig. 5 is a front view of the cabinet as shown in Fig. 1 with the chair elevated and inclined intoA what is known as Syms position. Fig. 6 is a front view of the cabinet with the drawers and doors relnoved,showing the chair elevated and inclinedto what is known as the chloroform position; and Fig. 7 is a detail section of the ratchet and pawl operating mechanism for adjusting the back and leg sections of the chair. i

Similar letters of reference are used to denote similar parts in each of the several views. A, in the drawings, denotes a cabinet of wood or other suitable material having side compartments or pockets A', and doors A2, for closing said compartments. These doors are adapted to swing around to about one hundred and eighty degrees so as to stand perpendicular to the face of the cabinent in proper position to support the top Athe latter being movable and preferably adapted to be slid onto the said doors so as to serve as a table adjacent to the chair when the`latter is elevated in position for use. Thecabinet may be further provided with drawers a, forming convenient receptacles for the tools or surgical instruments necessary to a surgical or dental operation.k The partitions a', of the pockets, together with the back A4, of the cabinet, and the drawers a, thereof, form a compartment in which is placed the mechanism B,`for elevating and lowering the chair C.

comprises preferably a sleeve B', supported on a rock-shaft B2, and ascrew-rod B3, which supports at its upper endthe chair C. Anut b,"tted upon the screw-rod B3, is `circumferentially toothed to engage a gear-wheel b3, on

islmountedin a bracket-armo, carried by the sleeve B {thegear-wheel or nut b, is confined between the gear b3, and the upper end of the sleeve B', and the shaft b', is provided with a handle b2, at its outer end. By this arrangement longitudinal movement of the screwrod B3, is prevented, but the rotation of the nut b, causes the threaded rod to be advanced or retracted within the sleeve B', so as to accomplish the elevation or depression of the chair. rlhe rock-shaft B2, is providedwith'a `gaged by a toothed bar D, preferably of spring metal, having a foot pedal d, projecting outside of the cabinet to permit it to be depressed for the purpose of disengaging the toothed segment on the shaft B2, so as to per- The elevating and lowering mechanism B,

curved or toothed segment B, which is enthe end of a horizontal shaft b', which latter ICO mit the said shaft and sleeve Bf, together with lthe mechanism supported thereon to be rocked to either side of a perpendicular position for the purpose of securing the desired inclination of the chair. On releasing the Vfoot pedal the toothed portion of the bar D,

will engage the segment B4, so as to lock the shaft B2,.and hold the seat supporting mechanism in the desired position.

The shaft b', may project through a curved slot a4, in the back A4, of the cabinet and the handle b2, is secured to its outer end for the purpose of turning the shaft so as to rotate the nut b, and raise or lower the chair. This arrangement brings the pedal on the toothed bar D, and`the handle b2, within easy reach of the operator, for accomplishing the desired adjustment.

The chair C, in the present instance is designed especially for surgical operations, but of course a chair of -a different construction may be supported upon the elevating mechanism and inclosed in the cabinet when not in use. The seat C', vis mounted upon the upper end of the screw-rod B3, in such manner as to be rotatable thereon in a plane perpendicular to said rod. Said seat is provided with side plates or frames c, c, which may I terminate in ratchet-faced segments c. The may i back section C2, and the leg section O3, be hinged to the seat C', in anysuitable manner. As shown Vthe back and leg sections are hinged to the side plates c, c, and

provisionnis made foradjustingsuch sections as Will now be described. Upon the ends of a rod E, carried by the back and leg sections are placed pawls e, which are held normally in engagement with the respective segments c', of the plates c, c, by means of a spring e', which bears upon a projection on said rod, the .spring being shown as surrounding -a tripping rod E', whichl is adapted to be pulled by la handle E2, so as to disengage the pawls against the action of the spring. Y

The foot rest C4, may be hinged to the lower end of the leg rest 03 and is adapted to be folded u p against the said leg rest. A head I rest of any suitable type may be used in connection with the back section C2, if desired.

The arm rests F, are shown as removably secured to the side frames c, but it is obvious that they may be hinged thereto, and they are preferably divided or sectional, the two sections being pivoted together as at f, so that one section may be swung outward at an angle for use in amputating an arm or performing some other operation necessitating the swinging of the arm outward so as to make it more accessible to the surgeon; this adjustment of the section being accomplished by simply loosening the setscrew f, adjustingv the arm, andthen tightening the screw 'so as 1 to secure the section in the desired position.

The cabinet forms the chairbase and is preferably provided with casters for convenence in moving the same about the room. Stirrups are provided for use particularly in gynecological cases and may be readily removed and placed Within the cabinet when not required for use.

From the foregoing description, a brief outline only of the manipulation of the chair and cabinet will be necessary. The cabinet being closed it will be seen, upon opening the doors at the side, that the back and leg sections are dropped downwardso as to lie in such a position as to fit the space provided by the pockets or compartments. The seat portion of the chair rests Within the space between the top of the cabinet and the upper portion of the partition walls a. The foot rest is folded-back upon the leg rest. The barm and head rests being removable, are conveniently stored by being placed upon the seat of the chair, or in any other suitable place within the cabinet.

When it is desired to use the chair, which by the foregoing arrangement has been protected from dust, soiling and unnecessary use, the doors of the cabinet may be opened, and the top thereof slid over so as to rest upon said doors and thereby form a table, and at the same time render the chair accessible. The operator will then turn the crank b2, until the chair is elevated to asufcient height; the back section and the leg section may then be raised to their proper positions, (which may be either a sitting or a reclining position) and the arm and head rests being properly placed, the chair is ready for use. The revolving of the chair in a plane perpendicular to the elevating screw rod and sleeve, and the oscillation of same upon the cross shaft B2,

-niakes a practically universal movement thereof possible, so that by this simple means the chair may be adjusted so as to place the patient in Whatever position may be desired,

as, for instance, the Syms, as shown in Fig.

5, or the chloroform as shown in Fig.. 6,'or such other position as is best adapted to bring the parts to be .operated upon or examined into the most advantageous position.

The manipulation of the chair is very simple-the ratchet adj ustmentot' the back land leg sections being obvious. The chair in the position for operations is conveniently located to the table upon which the instruments are placed, so that the operator can easily reach them, and the drawers of the cabinet -aord a convenient storage place for ltools or surgi- IOS IIO

cal instruments and serve to Vkeep them from,`

view until they are desired for use. The closing of the cabinet and the foldingof the chair therein involves simplya reversal of the operation which has just been described. When closed the cabinet may be made to present a very ornamental appearance, and may be utilized to advantage for various purposes. i

The cabinet and elevating mechanism are so constructed that the chair may be detached if desired. The top is preferably plain as shown l-in Fig. 2, but may have a slab as shown in Fig. l.

It is obvious that various modifications may be made in the arrangement and construction of parts without departing from the spirit of my invention, and hence I do not desire to be limited to the exact construction shown and described, for it is obvious that an ordinary rack bar might take the place of the elevating mechanism B, and be operated by a suitable lever or crank arm operating a pinion adapted to engage the rack bar, and any suitable locking device would hold the chair at the desired elevation. The hinged back and leg sections might also be adjusted and sustained in the desired position by knuckle braces, or levers and slides.`

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A surgical appliance comprising the cabitherein, and the chair rotatably mounted on 'said mechanism, the latter being adaptedto raise and lower the chair and to sustain the same in an elevated position for use, and to be inclined to either side of the cabinet, whereby the chair may be raised and arranged in various inclined positions in use, or lowered and housed within the cabinet, substantially as described.

2. A surgical appliance comprising the cabinet having the movable top and hinged doors, together with the chair-supporting and ele- Vating mechanism arranged within the cabinet and having the chair mounted thereon; said doors being adapted to swing partially around to provide a support for said top, whereby a table is provided adjacent to the chair when the latter is elevated in position for use, substantially as described.

3. In combination with a surgical chair composed of a seat and hinged back and leg sections, mechanism for raising and lowering the same, a cabinet having pockets adapted to receive said back and leg sections, a removable top, and doors adapted to close said pockets when shut, and to support said top when open, whereby a table is formed, substantially as described.

4. In combination with a surgical chair lower the same, said mechanism being capalower the same, said mechanism being capa-` ble of oscillation andsaidchair being capable `ot' a gyratory movement, of a base for said chair consisting of a cabinet provided with pockets adapted to receive said back and leg sections, and doors adapted to close said pockets, said cabinet being adapted to inclose said chair when lowered, substan tially as described.

5. In combination with a surgical chair composed of a seat and hinged back and leg sections, mechanism adapted to raise and ble of oscillation and said chair being capable of a gyratory movement, means substantially as described for locking said mechanism in the desired position, and a base for said chair consisting of a cabinet provided with pockets adapted to receive said back and leg sections and doors adapted to close rod, a nut engaging said screw rod, and means for revolving said nut, whereby the chair is elevated and lowered; said raising and lowerin g mechanism being capable of oscillation,

and said chair being capable of a gyratory movement, substantially as described.

7. The combination with a surgical chair y composed of a seat and hinged back and leg sections, of mechanism adapted to raise and lower the saine, and a cabinet supporting said mechanism, the latter comprising a shaft' journaled in said cabinet, a sleeve, a screwrod, a nut engaging said screw-rod, and means for revolving said nut, whereby the chair is elevated and lowered; said raising and lowering mechanism being capable of oscillation and said chair being capable of a gyratory movement; and a device adapted to lock said elevating and lowering mechanism 1n the desired position, substantially as described.

8. The combination with a surgical chair composed of a seat and hinged back and leg sections, and mechanism adapted to raise and lower the same, of a cabinet supporting said IOO mechanism; the latter comprising a shaft journaled in said cabinet, a sleeve projecting from the shaft, a screw-rod fitting at one end in, said sleeve, a nut on said rod provided with gear teeth, a gear upon a horizontal shaft j ournaled in a bracket carried by said sleeve, and a handle whereby the shaft is rotated and said nut caused to rotate; said screw-rod having the chair mounted thereon to be elevated,`substantially as described.

9. The combination with asurgical chair composed of a seat and hinged back and leg sections, of mechanism adapted to raise and lower the saine, and a cabinet supportingand housing said mechanism, the latter comprising a screw-rod on which the chair is mounted, anut rotatably held upon and engaging said screw-rod, and means extending from within the cabinet to the exterior thereof for revolving said nut, whereby the chair is elevated and lowered, substantially as described.

In testimony whereof I aftix my signaturein presence of two witnesses.

J. F. STRAYER, J No. D. WILHELM.

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